如何获取具有图像或视频的文件夹的路径

Question

我想创建一个安卓图库应用。

如何扫描和获取包含照片或视频的文件夹路径。

我使用了这段代码并且工作了。但是当我将它与 Play 商店中的 Quickpic Gallery 进行比较时，我发现我的应用程序中的文件夹数量少于 Quickpic 文件夹

你发现这段代码有什么问题吗？

        Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
    Cursor cursor = ba.context.getContentResolver().query(uri, null, null,
            null, MediaStore.Images.ImageColumns.BUCKET_DISPLAY_NAME);
    if (cursor != null) {
        cursor.moveToFirst();
        int data = cursor
                .getColumnIndex(MediaStore.Images.ImageColumns.DATA);
        int displayName = cursor
                .getColumnIndex(MediaStore.Images.ImageColumns.DISPLAY_NAME);
        imageFolders = new HashMap<>();
        do {
            String imageAddress = cursor.getString(data);
            String imageName = cursor.getString(displayName);
            String folderAddress = imageAddress.substring(0,
                    imageAddress.lastIndexOf(imageName) - 1);

            if (!imageFolders.containsKey(folderAddress)) {
                imageFolders.put(folderAddress, imageAddress);
            }
        } while (cursor.moveToNext());
        for (String str : imageFolders.keySet()) {

            ba.raiseEventFromDifferentThread(
                    null,
                    null,
                    0,
                    "result",
                    true,
                    new Object[] { String.format("%s", str),
                            String.format("%s", imageFolders.get(str)) });
        }

    }

Answer 1

我可以看到您正在尝试获取包含视频文件的所有文件夹的文件夹名称@prakash ubhadiya 给出的答案是一个很好的工作，但如果存在许多具有相同名称的此类文件夹，则该函数将保留只有一个而忽略其余的，下面我修改了他的功能，不仅返回文件夹名称，还返回文件夹绝对路径，以防你想用它来获取该特定文件夹中的所有视频文件，我创建了一个类称为floderFacer 保存文件夹名称和文件夹绝对路径，这样做不会忽略具有相同名称的文件夹下面是类

public class folderFacer {

    private String path;
    private String folderName;

    public folderFacer(){

    }

    public folderFacer(String path, String folderName) {
        this.path = path;
        this.folderName = folderName;
    }

    public String getPath() {
        return path;
    }

    public void setPath(String path) {
        this.path = path;
    }

    public String getFolderName() {
        return folderName;
    }

    public void setFolderName(String folderName) {
        this.folderName = folderName;
    }
} 

现在下面是修改后的函数，它将在 folderFacer 对象中返回文件夹名称和路径，全部在 ArrayList<folderFacer> 中

private ArrayList<folderFacer> getVideoPaths(){
        ArrayList<folderFacer> videoFolders = new ArrayList<>();
        ArrayList<String> videoPaths = new ArrayList<>();
        Uri allVideosuri = android.provider.MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
        String[] projection = { MediaStore.Video.VideoColumns.DATA ,MediaStore.Video.Media.DISPLAY_NAME,
                MediaStore.Video.Media.BUCKET_DISPLAY_NAME,MediaStore.Video.Media.BUCKET_ID};
        Cursor cursor = getContentResolver().query(allVideosuri, projection, null, null, null);

        try {
            cursor.moveToFirst();
            do{

                folderFacer folds = new folderFacer();

              String name = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DISPLAY_NAME));
              String folder = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.BUCKET_DISPLAY_NAME));
              String datapath = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA));

              String folderpaths =  datapath.replace(name,"");
                if (!videoPaths.contains(folderpaths)) {
                    videoPaths.add(folderpaths);

                    folds.setPath(folderpaths);
                    folds.setFolderName(folder);
                    videoFolders.add(folds);
                }

            }while(cursor.moveToNext());

            cursor.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        for(int i = 0;i < videoFolders.size();i++){

            Log.d("video folders",videoFolders.get(i).getFolderName()+" and path = "+videoFolders.get(i).getPath());

        }

        return videoFolders;
    }

希望对你有帮助

Answer 2

这样您就可以找到所有的视频和图片父级。

ArrayList<String> allFolder;
    HashMap<String, ArrayList<String>> listImageByFolder;
    ArrayList<String> allVideoFolder;
    HashMap<String, ArrayList<String>> listVideoByFolder;

查找所有图片文件夹路径 私人无效 getImageFolderList() {

        String[] projection = new String[] { MediaStore.Images.Media.DATA,
                MediaStore.Images.Media._ID,
                MediaStore.Images.Media.BUCKET_DISPLAY_NAME,
                MediaStore.Images.Media.DATE_TAKEN };
        Uri images = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
        final String orderBy = MediaStore.Images.Media.DATE_TAKEN;
        Cursor cur = getContentResolver().query(images, projection, // Which
                                                                    // columns
                                                                    // to return
                null, // Which rows to return (all rows)
                null, // Selection arguments (none)
                orderBy + " DESC" // Ordering
        );
        ArrayList<String> imagePath;
        if (cur.moveToFirst()) {
            String bucket, date;
            int bucketColumn = cur.getColumnIndex(MediaStore.Images.Media.BUCKET_DISPLAY_NAME);
            int dateColumn = cur.getColumnIndex(MediaStore.Images.Media.DATE_TAKEN);
            do {
                bucket = cur.getString(bucketColumn);
                date = cur.getString(dateColumn);
                if (!allFolder.contains(bucket)) {
                    allFolder.add(bucket);
                }
                imagePath = listImageByFolder.get(bucket);
                if (imagePath == null) {
                    imagePath = new ArrayList<String>();
                }
                imagePath.add(cur.getString(cur
                        .getColumnIndex(MediaStore.Images.Media.DATA)));
                listImageByFolder.put(bucket, imagePath);
            } while (cur.moveToNext());
        }
    }

查找所有视频文件夹路径

    private void getVideoFolderList() {
        String[] projection = new String[] { MediaStore.Video.Media.DATA,
                MediaStore.Video.Media._ID,
                MediaStore.Video.Media.BUCKET_DISPLAY_NAME,
                MediaStore.Video.Media.DATE_TAKEN };
        Uri images = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
        final String orderBy = MediaStore.Video.Media.DATE_TAKEN;
        Cursor cur = getContentResolver().query(images, projection, // Which
                                                                    // columns
                                                                    // to return
                null, // Which rows to return (all rows)
                null, // Selection arguments (none)
                orderBy + " DESC" // Ordering
        );
        ArrayList<String> imagePath;
        if (cur.moveToFirst()) {
            String bucket, date;
            int bucketColumn = cur.getColumnIndex(MediaStore.Video.Media.BUCKET_DISPLAY_NAME);
            int dateColumn = cur.getColumnIndex(MediaStore.Video.Media.DATE_TAKEN);
            do {
                bucket = cur.getString(bucketColumn);
                date = cur.getString(dateColumn);
                if (!allVideoFolder.contains(bucket)) {
                    allVideoFolder.add(bucket);
                }
                imagePath = listVideoByFolder.get(bucket);
                if (imagePath == null) {
                    imagePath = new ArrayList<String>();
                }
                imagePath.add(cur.getString(cur
                        .getColumnIndex(MediaStore.Images.Media.DATA)));
                listVideoByFolder.put(bucket, imagePath);
            } while (cur.moveToNext());
        }
    }